A piece of wood of mass 22.5 kg is attached to an ideal massless spring and allowed to hang in the Earth's gravitational field. The spring stretches 5.4 centimeters before it reaches its equilibrium position. If this system is next set into oscillation, what will be its frequency, in Hertz

Why is rain likely when warm, moisture-laden air meets cold air? a) the lighter warm air will rise and cool down, causing condensation and rain. b) the cold air moves faster and pushes the warm air away, causing condensation and rain. c) the moisture in the warm air condenses on contact with the cold air, causing rain to fall. d) the cold air mixes with the warm air, reducing its temperature causing moisture to condense.